Electric fuse-plug



J. GLATZ. ELEcTmcwsE PLUG.

VAPPLICATION men ma. 8.

Patented Aug. 19, 1919.

UnrrED STATES PATENT oFFicE;

JOSEPH GLAI'Z, F IPHILAIDEL-PHIA, PENNSYLVANIL ELECTRIC FUSE-PLUG.

Specification of Letters Ifatent.

Patented Aug. in, 1919 Application filed February 8, 1919. Serial No.275,713.

To w om it may concern:

2 n one it men n that I, Josnrn ,(ILATZ, a citi- Year eliective inoperation, and is not likely to get; out of order. p

In carrying out my invention, I employ body portion having therein acavity or recess of a novel C011l'L11,Wl1l0l1 extends into said bodypreferably at an angle tothe median or axial line thereof, and I locatein said cavity, a conducting clip and alsoa. noncondnctor of novelcontour, between th lower portion of which is located a fuse wire, whoseconstruction will hereinafter he more fully set forth.

One of the objects of my invcntion'is to provide a socket having'novelmeans for permitting the insertion and removal of the fuse metal, and"for enabling the latter to make the necessary contact with the threadon the plug.

A further object of my invention is to provide in conjunction with animproved, renewable iuse, side channels in the plug at for-ding meansfor permitting the ready and instantaneous escape of the gases generatedby the blowing out of the fuse metal.

A further object of my invention is to collocnte in a novel manner, afuse of any conventional type with a threaded outer conducting shellpermanently secured on the body of the plug and having a-lip contactingwith the fuse metal, in conjunction with a. novel removable, taper,wedge-shaped non-conduetor, which latter, together with the fuse metal,is properly held inassembled position by a novel removable clipfofconducting material. h v

Vs ith these andothcr objects in view, the invention comprises certainnovel sir-notions, .combinations and arrangement of parts as willhereinafter more fully be described and claimed,

the non-conducting wedge and conducting con- For the purpose ofillustrating my amention, I have. shown in the aecompaiiying drawingsone form thereof, w ich is ati'present preferred by me, since th, .a'inewill he found in practice to give satisfngtory"and reliable results,although it is tobe understood that the various instrumentaliti of whichmy invention consists can be "rm-i ously arranged and organized andthat-my invention is not limited to th'e prec'" rangement andorganization of the-Fe ii trumentalities, as herein shown and ties IFigure 1 represents a side elevation, partly in section of an electricfuse plug'embodying my invention, the sect-i'oirlieiniq taken on line1-1, Fig. 2. I i

F 2 represents a plan view of Fig. 1-.

Fig. 3 represents a perspective view of clip employed indetachedpositiom Similar numerals of referenceindi corresponding partsin the drawings 1d ovel constrn in proie the threadet lar conductingmaterial. The shell is caused to engage the extensi n? as-i'hdic at 4,so that said shell e. lot be reedi moved from said extension .1 The topof shell 5 is prov ded with the inwardlyturned flange 6, which has aport-ion "7 formed with a downwardly deflected tongue-orterininal S,which adapted to bebent downwardly or in an oblique angle againsttheavall of the cavity or recess 10. This oavity ldfcontains the fuse,non-conducting wedge" and conducting clip to be hereafter refer: to andextends into the socket :ody -at ani an le to the axis thereof,and'comp'rise "th clined wall 11, which extends ant downwardly into thebody to the be t, concavity 12, from which latter extends upwardly thediverging oppositewall 13, which merges into the wall :frorii whichextendsupwardly the inclined. wall, -15, which may be parallelto thewall 1111211141 merges into the wall 9.- The carit i it) h s-theparallelside walls 16 as i cm} Fig. 2.,Wl1lCl1 atthe left in the wallsl?and 18, thetwolatte the sides of an angular shaped'c to whose tion ofsaid channel being to permit the and pulled upwardly ready upward escapeof the gases, when a fuse blows out, as will be hereafter explained'.

19' designates a clip or conductor of brass, or similar conductingmaterial, whose top terminates in the laterally deflected contact point20, which engages the top of the wedge-shaped non-conductor'or wedge21'. The lower portion of the clip 19 is bent as indicated at 22, andextends upwardly a short distance as indicated at 23.

The wedge-shaped non-conductor 21 has the inclined walls 2-1 and25 whichconverge downwardly and terminate at their bottom I in the curved walls26, there being a space between the wedge-shaped non-conductor 21,

and the clip 19, the lower portion of which space is occupied by thefuse 27, the latter -having the short upwardly extending portion 28 andthe longer upwardly extending member 29, which may extend to the top ofthe wedge 21, as seen in Fig 1.

In order to enable the non-conducting wedge 21 and its adjuncts to bereadily removed from theplug when desired,-by the thumb and fingers, Iform the downwardly inclined walls 30, which slope from the outerportion of the socket body to about the dot-v ted line 31, seen in Fig.1, whereby the wedge 21 and its adjuncts can be readily grasped from thecavity 10, when desired.

It will thus be seen from the foregoing that my novel plug has a cavity10 therein which extends at an angle to the median line or axis of theplug, and that the walls 11 and 13 of said cavity converge down wardly,while the walls 15 and 11 are parallel and the walls 16 are alsoparallel.

It will further be seen that the walls 24: and 25 of the non-conductingwedge 21 converge downwardly and that the clip 19 when the parts areassembled is contiguous to the wall 11 of the cavity .10, the contact 20engaging the top of the. wedge 21 and the -shaped bottom end of saidcliprsurround ingthe bottom of the wedge 21, and hblding the" lower endof the fuse 27 in fixed position with respect to the bottom of the wedge21.

It will further be apparent that by the wedging action of thenon-conductor 21 with respect to the clip 19 and its adjuncts, alltheparts are firmly held in position, after being assembled.

The operation and manner of assembling the parts will be apparent tothose skilled in the art. The lower end 27 of the fuse 29, having beenbent around the lower end of the wedge 21, the clip 19 is then slipped un the wedge, and the fuse, wedge andc ip are inserted into the positionseen and properly retained by frictional contact.

The upper end of the fuse 29, forms a conor tongue 8, and in case thefuse blows out,

the gases have a free exit upwardly through the side channels formed bythe walls 17 and 18.

For convenience of manufacture, I form the walls 11 and 15,. parallel bymeans of any suitable implement, but this is not essential, it beingonly-necessary that the side channels be formed in any suitable mannerfor the egress of the gases, when a fuse blows out.

It will be apparent that by reason of the provision of the cavity 10having the walls 9 and 11 inclined in the manner described, inconjunction with the employment of the non-conducting wedge 21 shapedsubstantially as described, that when the threaded shell 5 is screwedinto position and pressure is exerted upon the contact or terminal 20,the tendency will be to wedge the upper under surface of the fi serz29tightly against the tongue, lip or contact point 8, thereby producing aneffective electrical connection between the fuse and the contactingouter threaded shell 5. It will be further apparent that by constructingand assembling the wedge 21, clip 19 and fuse 29 in the mannerdescribed, these three elements can be readily inserted and withdrawnfrom the cavity 10" as a unit.

I -It will now be apparent that I have devised a novel and usefulconstruction of an electric fuse plug, which embodies the features ofadvantage enumerated as desirable in the statement of the invention ofthe above description, and while I have in the present instance, shownand described preferred embodiments thereof which will give in practicesatisfactory and reliable results, it is to be understood that the sameis susceptible of modification in various particulars without departingfrom the spirit or scope of the invention or sacrificing any of itsadvantages.

Having thus described my invention, what I claim as new and desire tosecure by Let--- ters Patent is 1. In a device of the character stated,a plug having a cavity therein, a non-conducting wedge, a conductingclip and a fuse adapted to be inserted and withdrawn from said cavity asa unit, and side channels extending from said fuse upwardly at each sideof said wedge for permitting the escape of gases created when a fuseblows out.

2. In a device of the character stated, a I

body having a cavity therein contained in an upward extension from saidbody, a threaded shell of conducting material secured to said extensionand having a clownwardly turned lip engaging a wall of said cavity, anon-conducting wedge, a clip engaging the top and bottom of said wedge,

and a fuse held between said clip and wedge and having its upper endcontacting with the lip of said shell.

3. In a device of the character stated, a body haying an extensionprovided with a cai'ity therein, inclined at an angle to the median lineof said body, a non-conducting wedge having downwardly converging walls,a conducting clip having a deflected upper portion engaging the top ofsaid wedge and a bent bottom portion engaging the bottom of said wedge,a fuse having its lower end held between said clip and wedge, a.threaded casing engaging said extension, and means for forming a contactbetween the upper end of said fuse and said casing.

4C. In a device of the character stated, a

body having an extension provided with a thread d conducting shell, aninclined cavity in said extension, a portion of said shell having a lipdeflected into said cavity, a wedge, clip and fuse adapted to beinserted into and withdrawn from said cavity as a unit, and sidechannels extending from said cavity upwardly at each side of said wedgeto form passages for the escape of the gases created by a blown fuse.

5.111 a device of the character stated, a

plug having a cavity therein inclined at an 6. In a device of thecharacter stated, a

plug having a cavity therein extending at an angle to its median line, anon-conducting wedge, a conducting clip, and a fuse,'adapted to beinsertedand withdrawn from said cavity as a unit, the top of said wedgeextending at a right angle to said median line, said channels extendingfrom said fuse downwardly at each side for permitting the escape ofgaseswhen the fuse blows out, and inclined side walls at the top of saidplug for permitting the Wedge and its adjuncts to be readily graspedwhen it is desired to remove the same.

JOSEPH GLATZ. lVitnesses E. I'IAYWARD FAIRBANKS,

C. D. MCVAY.

